The next day when she had seated herself at table with the king and all the courtiers, and was eating from her little golden plate, something came creeping splish splash, splish splash, up the marble staircase, and when it had got to the top, it knocked at the door and cried, “Princess, youngest princess, open the door for me.” She ran to see who was outside, but when she opened the door, there sat the frog in front of it. Then she slammed the door to, in great haste, sat down to dinner again, and was quite frightened. The king saw plainly that her heart was beating violently, and said, “My child, what are you so afraid of? Is there perchance a giant outside who wants to carry you away?” “Ah, no,” replied she. “It is no giant but a disgusting frog.”

“What does a frog want with you?” “Ah, dear father, yesterday as I was in the forest sitting by the well, playing, my golden ball fell into the water. And because I cried so, the frog brought it out again for me, and because he so insisted, I promised him he should be my companion, but I never thought he would be able to come out of his water. And now he is outside there, and wants to come in to me.”

In the meantime it knocked a second time, and cried, “Princess, youngest princess, open the door for me, do you not know what you said to me yesterday by the cool waters of the well. Princess, youngest princess, open the door for me.”

‘The Frog Prince’, Brothers Grimm